However, today, the word is widely used and the way any services are delivered can vary wildly.  

They can vary WILDLY year to year.

ARV, that is the one wild card I am pretty concerned about.

In short, you’re going to put a much bigger chunk of your real estate 7-8% in your pocket than you are your index fund 7-8%.As others have stated, what constitutes a “good return” can vary wildly from investor to investor for many reasons, so the decision should be made using that individual investor’s criteria and goals.

I even swung the down payment rate wildly from 50% to 3% and there's no change to cashflow...weird, no??

Just a wild guess because there are thousands of California investors super hungry to purchase apartment buildings.

I have seen this fluctuate wildly over time and agree with the observations on length of stay and guest age and quality. 

Thanks @Jonathan Wild.

Cities without history of re-zoning are wildly unpredictable. 

@Leslie Laboriel I would surly bid again at the price point that make sense as an investment...banks don't have feeling...wait a week or two and make the offer again...whatever you think is working for your situation.Where I am REO prices vary wildly...some sell for 40% of original debt others at asking...hard to figure without actually bidding.